纳米钨/碳化钨粉末的形貌遗传特性及其对粉末均匀性的影响  

Genetic Characteristics of Morphologies of Nano-tungsten and Tungsten Carbide Powders and Its Impact on Powder Uniformity

作　　者：雷纯鹏[1,2] 唐建成[2] 刘万顺 吴爱华 张方 

机构地区：[1]南昌硬质合金有限责任公司,江西南昌330013 [2]南昌大学材料科学与工程学院,江西南昌330031

出　　处：《硬质合金》2012年第5期302-308,共7页Cemented Carbides

基　　金：国家自然科学基金(50801037;51071082);教育部博士学科点专项基金(20103601110001);教育部长江学者和创新团队发展计划(IRT0730);教育部新世纪优秀人才支持计划(NCET-10-0183)

摘　　要：为研究氧化钨的形貌结构对纳米钨粉末制品均匀性的影响,用X射线衍射分析仪和电子扫描电镜对普通黄钨在660℃下还原的过程产物进行了分析、观测。同时分别以普通黄钨和强力球磨分级处理的细黄钨为原料,采用经优化的工艺条件制备出了纳米W、WC粉末,并对粉末及其快速烧结体的显微组织结构进行了观察、分析。结果表明,不同形貌结构原料制备的纳米W、WC粉末,均呈现出不同程度的形貌结构遗传特性,强力球磨分级处理所获细黄钨颗粒细小、形貌结构疏松,更容易制备出结构较疏松,分散性较好的纳米W、WC粉末。Different tungsten oxides were prepared from yellow tungsten by hydrogen reduction at the temperature of 660 ℃ for different time. The morphological characteristics of different powders were observed and analyzed. In addition, nano-tungsten and tungsten carbide powders were manufactured using powerful milled WO3 powders as raw materials and compared with similar powders made by ordinary WO3 as precursors. The microstructures of the powders and the rapid sintered samples were characterized. The results show that the morphologies of nano-tungsten and tungsten carbide powders show characteristics inherited from oxide precursors to some extend. The nano-tungsten and tungsten carbide powders prepared by powerful milled WO3 as raw material show better characteristics, such as better dispersion, less agglomeration, better uniformity, etc. The microstructures of ultra-fine rapid WC-Co alloy prepared by powerful milled WO3 powders as precursors are uniform.

关 键 词：氧化钨 形貌结构 纳米 团聚 

分 类 号：TB383.1[一般工业技术—材料科学与工程]